Bug 784224: Page-mod tests now work on Fennec
bug 784224: addressing review comments
Merge commit 'ac63592a80d6d316b52b51941434e15feadb0699' into 784224-2

Conflicts:
	lib/sdk/tabs/tab-fennec.js
	lib/sdk/tabs/utils.js
	test/test-page-mod.js
bug 784224: removing unnecessary use of rawTabNS
bug 784224: making a more clear separation between tabs/utils and tabs/helpers
Merge pull request #793 from erikvold/784224-2

Fix Bug 784224: Page-mod tests now work on Fennec r=@ochameau